The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 15, 1994
Filed:
Jul. 26, 1993
Applicant:
Inventors:
Gueorgui M Mihaylov, Virginia Beach, VA (US);
Kirollos S Kirollos, Virginia Beach, VA (US);
Kevin L Lockerby, Chesapeake, VA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01J / ;
U.S. Cl.
CPC ...
422 87 ; 422 55 ; 422 57 ; 422 58 ; 422 86 ; 422 83 ; 422 88 ; 435807 ; 436165 ; 436169 ; 436170 ; 436805 ;
Abstract
A direct-read exposimeter for providing a visual, graded measurement of color variation corresponding to different ranges of dosage exposure to a polluting gas in the atmosphere over a given time period. The exposimeter includes a color-forming member and at least one gas-diffusion control member within an enclosure formed between a base and a cover. The cover has a number of openings exposed to the atmosphere in alignment with a number of separate diffusion zones formed in the gas-diffusion control member.